Telegraph-repeater.



c. E. DAVIEs. TELEGBAPH REPEATEB.

APPLICATION FILED MAB.. 11, 1908.

Patented Apr. 6, 1909.

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CHARLES EDWARD DAVIES, OF OTTAWA, ONTARIO, CANADA.

TE LE GRAPH-RE PE ATER.

Specication of Letters Patent.

Patented April 6, 1909.

Application nled March 11, 1908. Serial No. 420,49.

To all whom it may concern:

Be it known that l, CHARLES EDWARD Drxvrns, ot the city of Ottawa, in the county of Carleton, liovinee of Ontario, Canada, have invented certain new and useful lmprovements in Telegraph-Repeaters, of which the following is a specification.

My invention relates to improvements in telegraph repeaters, and the objects of my invention are to provide a repeater' having a reduced number of instruments and in which the make and break oi the main line will be made directly by the moving armatures, .vhich armatures shall also operate to mak and break the local circuits.

The details of the invention are described more iiully in the following speci'i'ications and accompanying drawings and specifically set forth in the claims.

ln the drawings, Figure l is a diagrammatic view illustrating the connections oi the various circuits. Eig. 2 is a side view of the actual construction oi one of the pairs of instruments constituting the repeater.

Referring iii-st to liig. 2, A represents a suitable base having a magnet B supported thereon by brackets a and l), and provided with two sets oi windings connected respectively to the pairs of binding posts c, c, d a vid d, and through the center of the magnet a core C extends adjustable by means oil a screw c. ln vliront of the magnet an armature D of suitable magnetic material is provided, and pivoted at j" adjacent to the base. This magnet is normally retained in its position farthest removed from the magnet by means of a tension spring g connected to a suitable bracket h on the base. Above, and slightly in iront of the magnet, a bracket E is provided having a top member i, oi insulating material, whicl supports a 'Flexible spring lever ll" which carries at its extremity contact point G which is suitably insulated from the remainder oi the lever and has connected thereto a 'line Wire which leads to a binding post lr. The contact point G is adapted to be engaged by the end ol the armature D when drawn. toward the magnet. The upper part of the lever F carries a second contact point l which is adapted to coact with a similar point carried on the end of a screw H supported by an insulating bushing m in the bracket E and having a binding setscrew n at the extremity thereof. ln addition to the tension of the spring metal in the a small spring o is connected to the I upper part thereof, and to a screw p extending through an insulating bushing in the frame, whereby the tension may be accurately adjusted. in the bottom of the frame E a screw l may be supported in an insulated bushing g, the end of which is adapted to form a back stop for the armature D and on the opposite side a screw J may be provided, adapted to contact with the reverse side of the spring lever E at once affording a back stop for the same and means for making and breaking an auxiliary circuit should it be so desired.

i lever F lt will be observed in connection with the mechanical structure of the instrument itself that the combination of the spring operating the armature D, the spring lever E, and tension spring o connected to the same, afford together an exceedingly accurate means of adjusting and regulating the movements oi the lever and armature.

Referring now to Fig. l, which diagrammatically shows the connection of the two instruments which constitute the repeater, K and L represent the east and west main lines respectively having keys 5, 5 and batteries 6, 6/ therein. Each of these lines are connected to the windings 7, 7 on the electro-magnets S, 8 forming part of the two instruments. Each main line circuit after passing through one winding of the magnet of one instrument is then led to the opposite instrument and connected to the armature 9 or Q thereof, and from thence through the contact point 10 or l0 to the battery 6 er 6 to the ground. The second windings il, ll on the magnets 8, 8 are connected to auxiliary circuits l2, 12 which include the batteries 13, 13 and are completed through contacts points 14, 14 and the spring levers l5, 15], magnet l1 or 11 and the lever 15 or 15 in each auxiliary circuit, being thus on opposite instruments; that is to say, tracing out the auxiliary circuit, it will first pass through the magnet of one instrument, then pass to the spring armature of the other instrument, back through the contact point coperating therewith, through its own battery and from thence to the electro-magnet again.

lt may be observed here that the term auxiliary circuit is intended to include the ordinary local circuit illustrated which has a source of power independent of the main line as well as the other form oi auxiliary circuit frequently used in which the power is dethe electromay be made within the scope of the aprived from the main line led through a rheostat.

In operation, when the line is at rest both the armatures 9, 9 will be kept closed by the current in the main lines operating through the windings 7, 7 of the electro-magnets. When however one line is open to give a signal, which is the condition illustrated in Fig. 1, where the west line is open, the armature 9 will be released breaking the east line, but at the same time as this is done the auxiliary circuit l2 is completed, preventing the magnet from becoming demagnetized and continuing to hold the armature 9 in position, thus maintaining the continuity of the main line L through the armature 9 and contact point l0. From this it will be seen that whenever one ofthe main lines are broken to give a signal the corresponding auxiliary circuit is automatically completed and operates I to prevent the breaking of the main line giving the signal through the dencrgizing of the magnet, which would otherwise result from the breaking of the opposing main line.

The manner of transmitting the signal from one line to the opposing line is particu larly to be noted. It will be observed that whenever a break is made in one line, for instance L, the denergizing of the magnet 8 will result in a break between the armature 9 and the contact point 10', which will break the main line K. I/Vhen the line L is again completed, the magnet 8" will be energized again completing the circuit L, the make and break in the opposing line being at all times effected by an armature operated directly by the current in the line transmitting the signal, thus constituting a direct point repeater.

It will be observed that the number ol instruments in the repeater have been very much reduced, the one set of levers serving for both the main and local circuits owing to the fact that the magnets 8 and S carry two windings. As explained hereinbefore, the adjustment of the instrument can be made very finely. I

lWhile the invention has been described l herein with great particularity ol detail, yet it will be readily understood that in carrying out the construction of the saine, changes pended claims without departing from the spirit of the invention.

What I claim as my invention is:

1. In a telegraph repeater, the combination with the main lines; compound electromagnets therein and armatures controlled thereby, oi' auxiliary circuits including a winding oiI said compound electro-magnets and controlling the same armatures, and means operated by the movement ol' each armature for simultaneously breaking the auxiliary circuit which energizes the magnet controlling the opposite armature and holding closed the main line which energizes the magnet operating the moving armature.

2. In a telegraph instrument, the combination with the main lines, electro-magnets therein, and armatures controlled thereby, means directly operated by the movement of each armature for making and breaking the opposite main line to that controlling the electro-magnet operating the armature, and auxiliary circuits thrown into operation by the movement of the armatures and having means therein l'or energizing the magnet controlling the armature ol the transmitting main line. y

3, In a telegraphic repeater, the combination with the main line, compound electro magnets therein and armatures controlled thereby, oll auxiliary circuits including a winding ol'l said compound electro-magnets therein and controlling the same armatures, spring levers adapted to be engaged by the movement of the armatures, and means carried by each spring lever lor simultaneously breaking the auxiliary circuit which energizes the opposite magnet and holding the main line corresponding thereto closed.

4. In a telegraph repeater, the combina tion with the main line, compound electromagnets therein and armatures controlled thereby, ol` auxiliary circuits including a winding ol' said compound electro-magnetsl therein controlling the same armatures, spring levers having insulated contact points thereon adapted to engage the armatures in their movement and to enable the circuit ol` the main line to be completed through the armature and contact point, and additional means carried by the spring levers for breaking the auxiliary circuits, which energize the electro-magnet controlling the armature of the opposite line to that completed through the contact point on the said lever.

.5. In a telegraph repeater, the combination with the main line, compound electro magnets therein and armatures controlled thereby, oll auxiliary circuits including a winding of said compound electro-magnets therein, and controlling the same armatures, spring levers having insulated contact points thereon adapted to engage the armatures in their movement, and to enable the circuit of the main line to be completed through the armature and contact point, and additional means carried by the spring levers for breaking the auxiliary circuits which energize the electro-magnet controlling 'the armature ol the opposite line to that completed through the contact point on the said lever, and spring regulating means l'or the spring lever.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

CHARLES EDWARD DAVIES. Witnesses RUSSEL S. SMART, J. H. GLEN. 

